/**
 * Copyright (c) 2006-2015, JGraph Ltd
 * Copyright (c) 2006-2015, Gaudenz Alder
 */
/**
 *
 * Class: mxVmlCanvas2D
 *
 * Implements a canvas to be used for rendering VML. Here is an example of implementing a
 * fallback for SVG images which are not supported in VML-based browsers.
 *
 * (code)
 * var mxVmlCanvas2DImage = mxVmlCanvas2D.prototype.image;
 * mxVmlCanvas2D.prototype.image = function(x, y, w, h, src, aspect, flipH, flipV)
 * {
 *   if (src.substring(src.length - 4, src.length) == '.svg')
 *   {
 *     src = 'http://www.jgraph.com/images/mxgraph.gif';
 *   }
 *
 *   mxVmlCanvas2DImage.apply(this, arguments);
 * };
 * (end)
 *
 * To disable anti-aliasing in the output, use the following code.
 *
 * (code)
 * document.createStyleSheet().cssText = mxClient.VML_PREFIX + '\\:*{antialias:false;)}';
 * (end)
 *
 * A description of the public API is available in <mxXmlCanvas2D>. Note that
 * there is a known issue in VML where gradients are painted using the outer
 * bounding box of rotated shapes, not the actual bounds of the shape. See
 * also <text> for plain text label restrictions in shapes for VML.
 */
var mxVmlCanvas2D = function(root)
{
    mxAbstractCanvas2D.call(this);

    /**
     * Variable: root
     *
     * Reference to the container for the SVG content.
     */
    this.root = root;
};

/**
 * Extends mxAbstractCanvas2D
 */
mxUtils.extend(mxVmlCanvas2D, mxAbstractCanvas2D);

/**
 * Variable: path
 *
 * Holds the current DOM node.
 */
mxVmlCanvas2D.prototype.node = null;

/**
 * Variable: textEnabled
 *
 * Specifies if text output should be enabledetB. Default is true.
 */
mxVmlCanvas2D.prototype.textEnabled = true;

/**
 * Variable: moveOp
 *
 * Contains the string used for moving in paths. Default is 'm'.
 */
mxVmlCanvas2D.prototype.moveOp = 'm';

/**
 * Variable: lineOp
 *
 * Contains the string used for moving in paths. Default is 'l'.
 */
mxVmlCanvas2D.prototype.lineOp = 'l';

/**
 * Variable: curveOp
 *
 * Contains the string used for bezier curves. Default is 'c'.
 */
mxVmlCanvas2D.prototype.curveOp = 'c';

/**
 * Variable: closeOp
 *
 * Holds the operator for closing curves. Default is 'x e'.
 */
mxVmlCanvas2D.prototype.closeOp = 'x';

/**
 * Variable: rotatedHtmlBackground
 *
 * Background color for rotated HTML. Default is ''. This can be set to eg.
 * white to improve rendering of rotated text in VML for IE9.
 */
mxVmlCanvas2D.prototype.rotatedHtmlBackground = '';

/**
 * Variable: vmlScale
 *
 * Specifies the scale used to draw VML shapes.
 */
mxVmlCanvas2D.prototype.vmlScale = 1;

/**
 * Function: createElement
 *
 * Creates the given element using the document.
 */
mxVmlCanvas2D.prototype.createElement = function(name)
{
    return document.createElement(name);
};

/**
 * Function: createVmlElement
 *
 * Creates a new element using <createElement> and prefixes the given name with
 * <mxClient.VML_PREFIX>.
 */
mxVmlCanvas2D.prototype.createVmlElement = function(name)
{
    return this.createElement(mxClient.VML_PREFIX + ':' + name);
};

/**
 * Function: addNode
 *
 * Adds the current node to the <root>.
 */
mxVmlCanvas2D.prototype.addNode = function(filled, stroked)
{
    var node = this.node;
    var s = this.state;

    if (node != null)
    {
        if (node.nodeName == 'shape')
        {
            // Checks if the path is not empty
            if (this.path != null && this.path.length > 0)
            {
                node.path = this.path.join(' ') + ' e';
                node.style.width = this.root.style.width;
                node.style.height = this.root.style.height;
                node.coordsize = parseInt(node.style.width) + ' ' + parseInt(node.style.height);
            }
            else
            {
                return;
            }
        }

        node.strokeweight = this.format(Math.max(1, s.strokeWidth * s.scale / this.vmlScale)) + 'px';

        if (s.shadow)
        {
            this.root.appendChild(this.createShadow(node,
                filled && s.fillColor != null,
                stroked && s.strokeColor != null));
        }

        if (stroked && s.strokeColor != null)
        {
            node.stroked = 'true';
            node.strokecolor = s.strokeColor;
        }
        else
        {
            node.stroked = 'false';
        }

        node.appendChild(this.createStroke());

        if (filled && s.fillColor != null)
        {
            node.appendChild(this.createFill());
        }
        else if (this.pointerEvents && (node.nodeName != 'shape' ||
            this.path[this.path.length - 1] == this.closeOp))
        {
            node.appendChild(this.createTransparentFill());
        }
        else
        {
            node.filled = 'false';
        }

        // LATER: Update existing DOM for performance
        this.root.appendChild(node);
    }
};

/**
 * Function: createTransparentFill
 *
 * Creates a transparent fill.
 */
mxVmlCanvas2D.prototype.createTransparentFill = function()
{
    var fill = this.createVmlElement('fill');
    fill.src = mxClient.imageBasePath + '/transparent.gif';
    fill.type = 'tile';

    return fill;
};

/**
 * Function: createFill
 *
 * Creates a fill for the current state.
 */
mxVmlCanvas2D.prototype.createFill = function()
{
    var s = this.state;

    // Gradients in foregrounds not supported because special gradients
    // with bounds must be created for each element in graphics-canvases
    var fill = this.createVmlElement('fill');
    fill.color = s.fillColor;

    if (s.gradientColor != null)
    {
        fill.type = 'gradient';
        fill.method = 'none';
        fill.color2 = s.gradientColor;
        var angle = 180 - s.rotation;

        if (s.gradientDirection == mxConstants.DIRECTION_WEST)
        {
            angle -= 90 + ((this.root.style.flip == 'x') ? 180 : 0);
        }
        else if (s.gradientDirection == mxConstants.DIRECTION_EAST)
        {
            angle += 90 + ((this.root.style.flip == 'x') ? 180 : 0);
        }
        else if (s.gradientDirection == mxConstants.DIRECTION_NORTH)
        {
            angle -= 180 + ((this.root.style.flip == 'y') ? -180 : 0);
        }
        else
        {
            angle += ((this.root.style.flip == 'y') ? -180 : 0);
        }

        if (this.root.style.flip == 'x' || this.root.style.flip == 'y')
        {
            angle *= -1;
        }

        // LATER: Fix outer bounding box for rotated shapes used in VML.
        fill.angle = mxUtils.mod(angle, 360);
        fill.opacity = (s.alpha * s.gradientFillAlpha * 100) + '%';
        fill.setAttribute(mxClient.OFFICE_PREFIX + ':opacity2', (s.alpha * s.gradientAlpha * 100) + '%');
    }
    else if (s.alpha < 1 || s.fillAlpha < 1)
    {
        fill.opacity = (s.alpha * s.fillAlpha * 100) + '%';
    }

    return fill;
};
/**
 * Function: createStroke
 *
 * Creates a fill for the current state.
 */
mxVmlCanvas2D.prototype.createStroke = function()
{
    var s = this.state;
    var stroke = this.createVmlElement('stroke');
    stroke.endcap = s.lineCap || 'flat';
    stroke.joinstyle = s.lineJoin || 'miter';
    stroke.miterlimit = s.miterLimit || '10';

    if (s.alpha < 1 || s.strokeAlpha < 1)
    {
        stroke.opacity = (s.alpha * s.strokeAlpha * 100) + '%';
    }

    if (s.dashed)
    {
        stroke.dashstyle = this.getVmlDashStyle();
    }

    return stroke;
};

/**
 * Function: getVmlDashPattern
 *
 * Returns a VML dash pattern for the current dashPattern.
 * See http://msdn.microsoft.com/en-us/library/bb264085(v=vs.85).aspx
 */
mxVmlCanvas2D.prototype.getVmlDashStyle = function()
{
    var result = 'dash';

    if (typeof(this.state.dashPattern) === 'string')
    {
        var tok = this.state.dashPattern.split(' ');

        if (tok.length > 0 && tok[0] == 1)
        {
            result = '0 2';
        }
    }

    return result;
};

/**
 * Function: createShadow
 *
 * Creates a shadow for the given node.
 */
mxVmlCanvas2D.prototype.createShadow = function(node, filled, stroked)
{
    var s = this.state;
    var rad = -s.rotation * (Math.PI / 180);
    var cos = Math.cos(rad);
    var sin = Math.sin(rad);

    var dx = s.shadowDx * s.scale;
    var dy = s.shadowDy * s.scale;

    if (this.root.style.flip == 'x')
    {
        dx *= -1;
    }
    else if (this.root.style.flip == 'y')
    {
        dy *= -1;
    }

    var shadow = node.cloneNode(true);
    shadow.style.marginLeft = Math.round(dx * cos - dy * sin) + 'px';
    shadow.style.marginTop = Math.round(dx * sin + dy * cos) + 'px';

    // Workaround for wrong cloning in IE8 standards mode
    if (document.documentMode == 8)
    {
        shadow.strokeweight = node.strokeweight;

        if (node.nodeName == 'shape')
        {
            shadow.path = this.path.join(' ') + ' e';
            shadow.style.width = this.root.style.width;
            shadow.style.height = this.root.style.height;
            shadow.coordsize = parseInt(node.style.width) + ' ' + parseInt(node.style.height);
        }
    }

    if (stroked)
    {
        shadow.strokecolor = s.shadowColor;
        shadow.appendChild(this.createShadowStroke());
    }
    else
    {
        shadow.stroked = 'false';
    }

    if (filled)
    {
        shadow.appendChild(this.createShadowFill());
    }
    else
    {
        shadow.filled = 'false';
    }

    return shadow;
};

/**
 * Function: createShadowFill
 *
 * Creates the fill for the shadow.
 */
mxVmlCanvas2D.prototype.createShadowFill = function()
{
    var fill = this.createVmlElement('fill');
    fill.color = this.state.shadowColor;
    fill.opacity = (this.state.alpha * this.state.shadowAlpha * 100) + '%';

    return fill;
};

/**
 * Function: createShadowStroke
 *
 * Creates the stroke for the shadow.
 */
mxVmlCanvas2D.prototype.createShadowStroke = function()
{
    var stroke = this.createStroke();
    stroke.opacity = (this.state.alpha * this.state.shadowAlpha * 100) + '%';

    return stroke;
};

/**
 * Function: rotate
 *
 * Sets the rotation of the canvas. Note that rotation cannot be concatenated.
 */
mxVmlCanvas2D.prototype.rotate = function(theta, flipH, flipV, cx, cy)
{
    if (flipH && flipV)
    {
        theta += 180;
    }
    else if (flipH)
    {
        this.root.style.flip = 'x';
    }
    else if (flipV)
    {
        this.root.style.flip = 'y';
    }

    if (flipH ? !flipV : flipV)
    {
        theta *= -1;
    }

    this.root.style.rotation = theta;
    this.state.rotation = this.state.rotation + theta;
    this.state.rotationCx = cx;
    this.state.rotationCy = cy;
};

/**
 * Function: begin
 *
 * Extends superclass to create path.
 */
mxVmlCanvas2D.prototype.begin = function()
{
    mxAbstractCanvas2D.prototype.begin.apply(this, arguments);
    this.node = this.createVmlElement('shape');
    this.node.style.position = 'absolute';
};

/**
 * Function: quadTo
 *
 * Replaces quadratic curve with bezier curve in VML.
 */
mxVmlCanvas2D.prototype.quadTo = function(x1, y1, x2, y2)
{
    var s = this.state;

    var cpx0 = (this.lastX + s.dx) * s.scale;
    var cpy0 = (this.lastY + s.dy) * s.scale;
    var qpx1 = (x1 + s.dx) * s.scale;
    var qpy1 = (y1 + s.dy) * s.scale;
    var cpx3 = (x2 + s.dx) * s.scale;
    var cpy3 = (y2 + s.dy) * s.scale;

    var cpx1 = cpx0 + 2/3 * (qpx1 - cpx0);
    var cpy1 = cpy0 + 2/3 * (qpy1 - cpy0);

    var cpx2 = cpx3 + 2/3 * (qpx1 - cpx3);
    var cpy2 = cpy3 + 2/3 * (qpy1 - cpy3);

    this.path.push('c ' + this.format(cpx1) + ' ' + this.format(cpy1) +
        ' ' + this.format(cpx2) + ' ' + this.format(cpy2) +
        ' ' + this.format(cpx3) + ' ' + this.format(cpy3));
    this.lastX = (cpx3 / s.scale) - s.dx;
    this.lastY = (cpy3 / s.scale) - s.dy;

};

/**
 * Function: createRect
 *
 * Sets the glass gradient.
 */
mxVmlCanvas2D.prototype.createRect = function(nodeName, x, y, w, h)
{
    var s = this.state;
    var n = this.createVmlElement(nodeName);
    n.style.position = 'absolute';
    n.style.left = this.format((x + s.dx) * s.scale) + 'px';
    n.style.top = this.format((y + s.dy) * s.scale) + 'px';
    n.style.width = this.format(w * s.scale) + 'px';
    n.style.height = this.format(h * s.scale) + 'px';

    return n;
};

/**
 * Function: rect
 *
 * Sets the current path to a rectangle.
 */
mxVmlCanvas2D.prototype.rect = function(x, y, w, h)
{
    this.node = this.createRect('rect', x, y, w, h);
};

/**
 * Function: roundrect
 *
 * Sets the current path to a rounded rectangle.
 */
mxVmlCanvas2D.prototype.roundrect = function(x, y, w, h, dx, dy)
{
    this.node = this.createRect('roundrect', x, y, w, h);
    // SetAttribute needed here for IE8
    this.node.setAttribute('arcsize', Math.max(dx * 100 / w, dy * 100 / h) + '%');
};

/**
 * Function: ellipse
 *
 * Sets the current path to an ellipse.
 */
mxVmlCanvas2D.prototype.ellipse = function(x, y, w, h)
{
    this.node = this.createRect('oval', x, y, w, h);
};

/**
 * Function: image
 *
 * Paints an image.
 */
mxVmlCanvas2D.prototype.image = function(x, y, w, h, src, aspect, flipH, flipV)
{
    var node = null;

    if (!aspect)
    {
        node = this.createRect('image', x, y, w, h);
        node.src = src;
    }
    else
    {
        // Uses fill with aspect to avoid asynchronous update of size
        node = this.createRect('rect', x, y, w, h);
        node.stroked = 'false';

        // Handles image aspect via fill
        var fill = this.createVmlElement('fill');
        fill.aspect = (aspect) ? 'atmost' : 'ignore';
        fill.rotate = 'true';
        fill.type = 'frame';
        fill.src = src;

        node.appendChild(fill);
    }

    if (flipH && flipV)
    {
        node.style.rotation = '180';
    }
    else if (flipH)
    {
        node.style.flip = 'x';
    }
    else if (flipV)
    {
        node.style.flip = 'y';
    }

    if (this.state.alpha < 1 || this.state.fillAlpha < 1)
    {
        // KNOWN: Borders around transparent images in IE<9. Using fill.opacity
        // fixes this problem by adding a white background in all IE versions.
        node.style.filter += 'alpha(opacity=' + (this.state.alpha * this.state.fillAlpha * 100) + ')';
    }

    this.root.appendChild(node);
};

/**
 * Function: createText
 *
 * Creates the innermost element that contains the HTML text.
 */
mxVmlCanvas2D.prototype.createDiv = function(str, align, valign, overflow)
{
    var div = this.createElement('div');
    var state = this.state;

    var css = '';

    if (state.fontBackgroundColor != null)
    {
        css += 'background-color:' + mxUtils.htmlEntities(state.fontBackgroundColor) + ';';
    }

    if (state.fontBorderColor != null)
    {
        css += 'border:1px solid ' + mxUtils.htmlEntities(state.fontBorderColor) + ';';
    }

    if (mxUtils.isNode(str))
    {
        div.appendChild(str);
    }
    else
    {
        if (overflow != 'fill' && overflow != 'width')
        {
            var div2 = this.createElement('div');
            div2.style.cssText = css;
            div2.style.display = (mxClient.IS_QUIRKS) ? 'inline' : 'inline-block';
            div2.style.zoom = '1';
            div2.style.textDecoration = 'inherit';
            div2.innerHTML = str;
            div.appendChild(div2);
        }
        else
        {
            div.style.cssText = css;
            div.innerHTML = str;
        }
    }

    var style = div.style;

    style.fontSize = (state.fontSize / this.vmlScale) + 'px';
    style.fontFamily = state.fontFamily;
    style.color = state.fontColor;
    style.verticalAlign = 'top';
    style.textAlign = align || 'left';
    style.lineHeight = (mxConstants.ABSOLUTE_LINE_HEIGHT) ? (state.fontSize * mxConstants.LINE_HEIGHT / this.vmlScale) + 'px' : mxConstants.LINE_HEIGHT;

    if ((state.fontStyle & mxConstants.FONT_BOLD) == mxConstants.FONT_BOLD)
    {
        style.fontWeight = 'bold';
    }

    if ((state.fontStyle & mxConstants.FONT_ITALIC) == mxConstants.FONT_ITALIC)
    {
        style.fontStyle = 'italic';
    }

    if ((state.fontStyle & mxConstants.FONT_UNDERLINE) == mxConstants.FONT_UNDERLINE)
    {
        style.textDecoration = 'underline';
    }

    return div;
};

/**
 * Function: text
 *
 * Paints the given text. Possible values for format are empty string for plain
 * text and html for HTML markup. Clipping, text background and border are not
 * supported for plain text in VML.
 */
mxVmlCanvas2D.prototype.text = function(x, y, w, h, str, align, valign, wrap, format, overflow, clip, rotation, dir)
{
    if (this.textEnabled && str != null)
    {
        var s = this.state;

        if (format == 'html')
        {
            if (s.rotation != null)
            {
                var pt = this.rotatePoint(x, y, s.rotation, s.rotationCx, s.rotationCy);

                x = pt.x;
                y = pt.y;
            }

            if (document.documentMode == 8 && !mxClient.IS_EM)
            {
                x += s.dx;
                y += s.dy;

                // Workaround for rendering offsets
                if (overflow != 'fill' && valign == mxConstants.ALIGN_TOP)
                {
                    y -= 1;
                }
            }
            else
            {
                x *= s.scale;
                y *= s.scale;
            }

            // Adds event transparency in IE8 standards without the transparent background
            // filter which cannot be used due to bugs in the zoomed bounding box (too slow)
            // FIXME: No event transparency if inside v:rect (ie part of shape)
            // KNOWN: Offset wrong for rotated text with word that are longer than the wrapping
            // width in IE8 because real width of text cannot be determined here.
            // This should be fixed in mxText.updateBoundingBox by calling before this and
            // passing the real width to this method if not clipped and wrapped.
            var abs = (document.documentMode == 8 && !mxClient.IS_EM) ? this.createVmlElement('group') : this.createElement('div');
            abs.style.position = 'absolute';
            abs.style.display = 'inline';
            abs.style.left = this.format(x) + 'px';
            abs.style.top = this.format(y) + 'px';
            abs.style.zoom = s.scale;

            var box = this.createElement('div');
            box.style.position = 'relative';
            box.style.display = 'inline';

            var margin = mxUtils.getAlignmentAsPoint(align, valign);
            var dx = margin.x;
            var dy = margin.y;

            var div = this.createDiv(str, align, valign, overflow);
            var inner = this.createElement('div');

            if (dir != null)
            {
                div.setAttribute('dir', dir);
            }

            if (wrap && w > 0)
            {
                if (!clip)
                {
                    div.style.width = Math.round(w) + 'px';
                }

                div.style.wordWrap = mxConstants.WORD_WRAP;
                div.style.whiteSpace = 'normal';

                // LATER: Check if other cases need to be handled
                if (div.style.wordWrap == 'break-word')
                {
                    var tmp = div;

                    if (tmp.firstChild != null && tmp.firstChild.nodeName == 'DIV')
                    {
                        tmp.firstChild.style.width = '100%';
                    }
                }
            }
            else
            {
                div.style.whiteSpace = 'nowrap';
            }

            var rot = s.rotation + (rotation || 0);

            if (this.rotateHtml && rot != 0)
            {
                inner.style.display = 'inline';
                inner.style.zoom = '1';
                inner.appendChild(div);

                // Box not needed for rendering in IE8 standards
                if (document.documentMode == 8 && !mxClient.IS_EM && this.root.nodeName != 'DIV')
                {
                    box.appendChild(inner);
                    abs.appendChild(box);
                }
                else
                {
                    abs.appendChild(inner);
                }
            }
            else if (document.documentMode == 8 && !mxClient.IS_EM)
            {
                box.appendChild(div);
                abs.appendChild(box);
            }
            else
            {
                div.style.display = 'inline';
                abs.appendChild(div);
            }

            // Inserts the node into the DOM
            if (this.root.nodeName != 'DIV')
            {
                // Rectangle to fix position in group
                var rect = this.createVmlElement('rect');
                rect.stroked = 'false';
                rect.filled = 'false';

                rect.appendChild(abs);
                this.root.appendChild(rect);
            }
            else
            {
                this.root.appendChild(abs);
            }

            if (clip)
            {
                div.style.overflow = 'hidden';
                div.style.width = Math.round(w) + 'px';

                if (!mxClient.IS_QUIRKS)
                {
                    div.style.maxHeight = Math.round(h) + 'px';
                }
            }
            else if (overflow == 'fill')
            {
                // KNOWN: Affects horizontal alignment in quirks
                // but fill should only be used with align=left
                div.style.overflow = 'hidden';
                div.style.width = (Math.max(0, w) + 1) + 'px';
                div.style.height = (Math.max(0, h) + 1) + 'px';
            }
            else if (overflow == 'width')
            {
                // KNOWN: Affects horizontal alignment in quirks
                // but fill should only be used with align=left
                div.style.overflow = 'hidden';
                div.style.width = (Math.max(0, w) + 1) + 'px';
                div.style.maxHeight = (Math.max(0, h) + 1) + 'px';
            }

            if (this.rotateHtml && rot != 0)
            {
                var rad = rot * (Math.PI / 180);

                // Precalculate cos and sin for the rotation
                var real_cos = parseFloat(parseFloat(Math.cos(rad)).toFixed(8));
                var real_sin = parseFloat(parseFloat(Math.sin(-rad)).toFixed(8));

                rad %= 2 * Math.PI;
                if (rad < 0) rad += 2 * Math.PI;
                rad %= Math.PI;
                if (rad > Math.PI / 2) rad = Math.PI - rad;

                var cos = Math.cos(rad);
                var sin = Math.sin(rad);

                // Adds div to document to measure size
                if (document.documentMode == 8 && !mxClient.IS_EM)
                {
                    div.style.display = 'inline-block';
                    inner.style.display = 'inline-block';
                    box.style.display = 'inline-block';
                }

                div.style.visibility = 'hidden';
                div.style.position = 'absolute';
                document.body.appendChild(div);

                var sizeDiv = div;

                if (sizeDiv.firstChild != null && sizeDiv.firstChild.nodeName == 'DIV')
                {
                    sizeDiv = sizeDiv.firstChild;
                }

                var tmp = sizeDiv.offsetWidth + 3;
                var oh = sizeDiv.offsetHeight;

                if (clip)
                {
                    w = Math.min(w, tmp);
                    oh = Math.min(oh, h);
                }
                else
                {
                    w = tmp;
                }

                // Handles words that are longer than the given wrapping width
                if (wrap)
                {
                    div.style.width = w + 'px';
                }

                // Simulates max-height in quirks
                if (mxClient.IS_QUIRKS && (clip || overflow == 'width') && oh > h)
                {
                    oh = h;

                    // Quirks does not support maxHeight
                    div.style.height = oh + 'px';
                }

                h = oh;

                var top_fix = (h - h * cos + w * -sin) / 2 - real_sin * w * (dx + 0.5) + real_cos * h * (dy + 0.5);
                var left_fix = (w - w * cos + h * -sin) / 2 + real_cos * w * (dx + 0.5) + real_sin * h * (dy + 0.5);

                if (abs.nodeName == 'group' && this.root.nodeName == 'DIV')
                {
                    // Workaround for bug where group gets moved away if left and top are non-zero in IE8 standards
                    var pos = this.createElement('div');
                    pos.style.display = 'inline-block';
                    pos.style.position = 'absolute';
                    pos.style.left = this.format(x + (left_fix - w / 2) * s.scale) + 'px';
                    pos.style.top = this.format(y + (top_fix - h / 2) * s.scale) + 'px';

                    abs.parentNode.appendChild(pos);
                    pos.appendChild(abs);
                }
                else
                {
                    var sc = (document.documentMode == 8 && !mxClient.IS_EM) ? 1 : s.scale;

                    abs.style.left = this.format(x + (left_fix - w / 2) * sc) + 'px';
                    abs.style.top = this.format(y + (top_fix - h / 2) * sc) + 'px';
                }

                // KNOWN: Rotated text rendering quality is bad for IE9 quirks
                inner.style.filter = "progid:DXImageTransform.Microsoft.Matrix(M11="+real_cos+", M12="+
                    real_sin+", M21="+(-real_sin)+", M22="+real_cos+", sizingMethod='auto expand')";
                inner.style.backgroundColor = this.rotatedHtmlBackground;

                if (this.state.alpha < 1)
                {
                    inner.style.filter += 'alpha(opacity=' + (this.state.alpha * 100) + ')';
                }

                // Restore parent node for DIV
                inner.appendChild(div);
                div.style.position = '';
                div.style.visibility = '';
            }
            else if (document.documentMode != 8 || mxClient.IS_EM)
            {
                div.style.verticalAlign = 'top';

                if (this.state.alpha < 1)
                {
                    abs.style.filter = 'alpha(opacity=' + (this.state.alpha * 100) + ')';
                }

                // Adds div to document to measure size
                var divParent = div.parentNode;
                div.style.visibility = 'hidden';
                document.body.appendChild(div);

                w = div.offsetWidth;
                var oh = div.offsetHeight;

                // Simulates max-height in quirks
                if (mxClient.IS_QUIRKS && clip && oh > h)
                {
                    oh = h;

                    // Quirks does not support maxHeight
                    div.style.height = oh + 'px';
                }

                h = oh;

                div.style.visibility = '';
                divParent.appendChild(div);

                abs.style.left = this.format(x + w * dx * this.state.scale) + 'px';
                abs.style.top = this.format(y + h * dy * this.state.scale) + 'px';
            }
            else
            {
                if (this.state.alpha < 1)
                {
                    div.style.filter = 'alpha(opacity=' + (this.state.alpha * 100) + ')';
                }

                // Faster rendering in IE8 without offsetWidth/Height
                box.style.left = (dx * 100) + '%';
                box.style.top = (dy * 100) + '%';
            }
        }
        else
        {
            this.plainText(x, y, w, h, mxUtils.htmlEntities(str, false), align, valign, wrap, format, overflow, clip, rotation, dir);
        }
    }
};

/**
 * Function: plainText
 *
 * Paints the outline of the current path.
 */
mxVmlCanvas2D.prototype.plainText = function(x, y, w, h, str, align, valign, wrap, format, overflow, clip, rotation, dir)
{
    // TextDirection is ignored since this code is not used (format is always HTML in the text function)
    var s = this.state;
    x = (x + s.dx) * s.scale;
    y = (y + s.dy) * s.scale;

    var node = this.createVmlElement('shape');
    node.style.width = '1px';
    node.style.height = '1px';
    node.stroked = 'false';

    var fill = this.createVmlElement('fill');
    fill.color = s.fontColor;
    fill.opacity = (s.alpha * 100) + '%';
    node.appendChild(fill);

    var path = this.createVmlElement('path');
    path.textpathok = 'true';
    path.v = 'm ' + this.format(0) + ' ' + this.format(0) + ' l ' + this.format(1) + ' ' + this.format(0);

    node.appendChild(path);

    // KNOWN: Font family and text decoration ignored
    var tp = this.createVmlElement('textpath');
    tp.style.cssText = 'v-text-align:' + align;
    tp.style.align = align;
    tp.style.fontFamily = s.fontFamily;
    tp.string = str;
    tp.on = 'true';

    // Scale via fontsize instead of node.style.zoom for correct offsets in IE8
    var size = s.fontSize * s.scale / this.vmlScale;
    tp.style.fontSize = size + 'px';

    // Bold
    if ((s.fontStyle & mxConstants.FONT_BOLD) == mxConstants.FONT_BOLD)
    {
        tp.style.fontWeight = 'bold';
    }

    // Italic
    if ((s.fontStyle & mxConstants.FONT_ITALIC) == mxConstants.FONT_ITALIC)
    {
        tp.style.fontStyle = 'italic';
    }

    // Underline
    if ((s.fontStyle & mxConstants.FONT_UNDERLINE) == mxConstants.FONT_UNDERLINE)
    {
        tp.style.textDecoration = 'underline';
    }

    var lines = str.split('\n');
    var textHeight = size + (lines.length - 1) * size * mxConstants.LINE_HEIGHT;
    var dx = 0;
    var dy = 0;

    if (valign == mxConstants.ALIGN_BOTTOM)
    {
        dy = - textHeight / 2;
    }
    else if (valign != mxConstants.ALIGN_MIDDLE) // top
    {
        dy = textHeight / 2;
    }

    if (rotation != null)
    {
        node.style.rotation = rotation;
        var rad = rotation * (Math.PI / 180);
        dx = Math.sin(rad) * dy;
        dy = Math.cos(rad) * dy;
    }

    // FIXME: Clipping is relative to bounding box
    /*if (clip)
    {
        node.style.clip = 'rect(0px ' + this.format(w) + 'px ' + this.format(h) + 'px 0px)';
    }*/

    node.appendChild(tp);
    node.style.left = this.format(x - dx) + 'px';
    node.style.top = this.format(y + dy) + 'px';

    this.root.appendChild(node);
};

/**
 * Function: stroke
 *
 * Paints the outline of the current path.
 */
mxVmlCanvas2D.prototype.stroke = function()
{
    this.addNode(false, true);
};

/**
 * Function: fill
 *
 * Fills the current path.
 */
mxVmlCanvas2D.prototype.fill = function()
{
    this.addNode(true, false);
};

/**
 * Function: fillAndStroke
 *
 * Fills and paints the outline of the current path.
 */
mxVmlCanvas2D.prototype.fillAndStroke = function()
{
    this.addNode(true, true);
};
